The correct answer is (a) 1 year.
The Estimates Committee is a standing committee of the Parliament of India. It is constituted every year to examine the estimates of expenditure of the Government of India. The Committee consists of 30 members, 15 from the Lok Sabha and 15 from the Rajya Sabha. The Committee is appointed by the Speaker of the Lok Sabha and the Chairman of the Rajya Sabha.
The tenure of the Estimates Committee is one year. The Committee submits its report to the Parliament within six months of its appointment. The report of the Committee is considered by the Parliament in the Budget Session.
The Estimates Committee is a powerful committee and its recommendations are binding on the Government. The Committee has the power to summon officials of the Government and to examine them on oath. The Committee also has the power to inspect documents and records of the Government.
The Estimates Committee plays an important role in ensuring that the Government spends public money in a prudent and efficient manner. The Committee also helps to improve the accountability of the Government to the Parliament.
The other options are incorrect because they are not the tenure of the Estimates Committee.