Which amendment increased the age of retirement of High Court judges from 60 to 62 years?

15th amendment

The correct answer is Option 2 - 15th amendment

Amendments made so far in the Indian constitution may be classified in three groups. In the first group there are amendments, which are of a technical or administrative nature and were only clarifications, explanations, and minor modifications etc. of the original provisions. They are amendments only in the legal sense, but in matter of fact, they made no substantial difference to the provisions. This is true of the amendment that increased the age of retirement of High Court judges from 60 to 62 years (15th amendment). Similarly, salaries of judges of High Courts and the Supreme Court were increased by an amendment (54th amendment).