Law Reform in the ancient period was ad hoc and not institutionalised.
However, since the third decade of the nineteenth century, Law Commissions were constituted by the Government from time to time.
The first law commission was established in 1834 under the Charter Act of 1833.
Thereafter, the second, third and fourth Law Commissions were constituted in 1853, 1861 and 1879 respectively helped adapt English Laws to Indian conditions.
The Indian Code of Civil Procedure, the Indian Contract Act, the Indian Evidence Act, the Transfer of Property Act etc. are products of the labour of the first four Law Commissions. The First Law Commission of Independent India was established in 1955 with the then Attorney-General of India, Mr. M. C. Setalvad, as its Chairman.

1, 2 and 3 are correct.
Constitution is the supreme law that determines the relationship among citizens and also the relationship between the citizens and government.
• It generates a degree of trust and coordination that is necessary for different kind of people to live together;
• It specifies how the government will be constituted, for e.g. by democratic elections.
• It lays down limits on the powers of the government and tells us what the rights of the citizens are; and
• It expresses the aspirations of the people, for e.g. by preamble and DPSP.

Quo warranto means “by what warrant”? This means that Supreme Court and High Court may issue the writ which restrains the person or authority to act in an office which he / she is not entitled to.
This writ is applicable to the public offices only and not to private offices

Both 1 and 2 are correct.
A Code of Conduct for members of Rajya Sabha has been in force since 2005; there is no such code for Lok Sabha.
Codes of conduct for high constitutional functionaries and representatives of the people have been discussed for long. A code for Union ministers was adopted in 1964, and state governments were advised to adopt it as well. A conference of Chief Justices in 1999 resolved to adopt a code of conduct for judges of the Supreme Court and High Courts — this 15-point ‘Re-instatement of Values in Judicial Life’ recommended that serving judges should maintain an air of “aloofness” in their official and personal lives.
In the UK, a code of conduct for MPs was “prepared pursuant to the Resolution of the House of 19 July 1995”. The Canadian House of Commons has a Conflict of Interest and Ethics Commissioner with powers to examine violations of the Conflict of Interest Code at the request of another Member or by Resolution of the House or on his own initiative. Germany has had a Code of Conduct for members of the Bundestag since 1972; the US has had a Code since 1968. Pakistan has a Code of Conduct for members of the Senate.

Only 1 is correct.
When a bill is sent to the governor after it is passed by state legislature, he can:
(a) Give his assent to the bill, or
(b) Withhold his assent to the bill, or
(c) Return the bill (if it is not a money bill) for reconsideration of the state legislature. However, if the bill is passed again by the state legislature with or without amendments, the governor has to give his assent to the bill, or
(d) Reserve the bill for the consideration of the president. In one case such reservation is obligatory, that is, where the bill passed by the state legislature endangers the position of the state high court. In addition, the governor can also reserve the bill if it is of the following nature:
(i) Ultra-vires, that is, against the provisions of the Constitution.
(ii) Opposed to the Directive Principles of State Policy.
(iii) Against the larger interest of the country.
(iv) Of grave national importance.
(v) Dealing with compulsory acquisition of property under Article 31A of the Constitution.