Which State/UT has the lowest % (percentage) of national population?

The correct answer is Option (3) → Lakshadweep

By the 2011 Census, the Union Territory of Lakshadweep had only about 64,000 people, the smallest population of any state or Union Territory and well under 0.01% of India’s population of about 121 crore. It is a group of small coral islands in the Arabian Sea.