What is the tenure of the Chief Election Commissioner of India?

• A. 4 years or up to the age of 65 years, whichever is earlier.
• B. 3 years or up to the age of 65 years, whichever is earlier.
• C. 5 years or up to the age of 65 years, whichever is earlier.
• D. 6 years or up to the age of 65 years, whichever is earlier.