What will come in place of question mark (?) in the following number series? I) 5, 31, 157, 631, 1897, 3799 II) 1……………….925. If 925 is the nth term find the value of n

• A. 6th term
• B. 7th term
• C. 4th term
• D. 8th term
• E. None of these