Concept: Natural guardianship under Hindu law is governed mainly by the Hindu Minority and Guardianship Act, 1956. The role of the mother as natural guardian was interpreted by the Supreme Court in an important case.
Step 1: Understand the issue.
The question asks whether the mother can act as natural guardian even during the lifetime of the father.
\[
\text{Issue} = \text{Mother's natural guardianship during father's lifetime}
\]
Step 2: Recall the case.
In Githa Hariharan v. Reserve Bank of India, the Supreme Court interpreted the word “after” in relation to the father not to mean only after the father's death. It held that the mother may also act as natural guardian in appropriate circumstances.
Step 3: Select the correct option.
Therefore, the case connected with this principle is Gitahariharan v. Reserve Bank of India.