Answer : 2. "Samudra Gupta "
Explanation :

The title "Lichchavi Duhitra" during the Gupta Age was associated with Emperor Kumaragupta I, not Samudragupta. Kumaragupta I was a ruler of the Gupta Empire, and "Lichchavi Duhitra" translates to "the son of the Lichchhavi princess." This title suggests his marriage into the Lichchhavi dynasty, an important political alliance during that time.