If D is the brother of B, how B is related to C? To answer this question which of the statements is/are necessary?

1. The son of D is the grandson of C.
2. B is the sister of D.

Obviously, the opposite statement weakens,'Not all these employees who use gymnasium are fit.'

As per following criteria given in the question, The candidates must
(i) Be at least 30 years old as on 1. 3. 2009.
Sudha Gopalan was born on 14th October 1978.
(ii) Have secured at least 55% marks in graduation.
She has secured 50% marks in graduation.
or
(b) at (ii) above but has secured at least 65% marks in Post - Graduate Degree/Diploma in Marketing management, the case is to be referred to Vice - President - Marketing.
She has secured 65% mark in Post-Graduate Diploma in Marketing.
(iii) Have secured at least 60% marks in Post-Graduate Degree/Diploma in Marketing.
She has secured 65% mark in Post-Graduate Diploma in Marketing.
(iv) Have post qualification work experience of at least five years in the Marketing Division of an organization.
She has been working for the past six years in the Marketing Division of an organization.
(v) Have secured at least 45% marks in the selection process.
She has secured 50% marks in the selection process.

Arranging all the digits in ascending order, we get
489, 145, 456, 359, 378
Hence , lowest number = 145 ? 541

As per given question, the letter series is following the below pattern.
L M N O
After using the pattern the complete letter series will be as below.
L M N O / O N M L / L M N O / O N M L

I is weak because it wrongly assumes that if other oil PSUs buy HPCL share, it will be unproductive. II is strong because it will facilitate government in getting more revenue through disinvestment .