In which case, New Partners' Current A/c is debited at the time of admission of a partner?

When new partner is unable to bring his share of goodwill in cash

The correct answer is option 1- When new partner is unable to bring his share of goodwill in cash.

New Partners' Current A/c is debited, when new partner is unable to bring his share of goodwill in cash at the time of admission of a partner.

When goodwill does not exist in the books, sacrificing partners are credited with their share of goodwill and new partner is debited by the amount of goodwill not brought by him.
The journal entry in this case is :
Incoming (New) Partners Current A/c Dr.
        To Sacrificing Partners Capital A/c (individually)
(Account of goodwill not brought in by new partner)

Sometimes the new partner brings part of premium for goodwill in cash. In such a situation, new partners current account will be debited by the amount not brought by new partner.