Explanation:

Alright, let’s break it down:

- Option 1: Shyamji Krishna Verma

He was a nationalist and founded India House in London, but he wasn’t a leader in the Gadar Movement. His work was influential, but it happened in a different circle, mostly in Britain.

- Option 2: Lal Hardayal

Here’s your guy. Lal Hardayal was one of the main founders of the Gadar Movement. He helped set up the Gadar Party in the US, aiming to spark a revolt against British rule in India.

- Option 3: Bipin Chandra Pal

He was a big name in the Indian freedom movement but not linked to the Gadar Movement. His focus was more on Swadeshi and moderating politics in India.

- Option 4: Vishnu Ganesh Pingle

He was associated with the Gadar Movement, and he played an important role in organizing revolutionary activities within India as a Gadar activist.

But here’s what matters:

Option 2 (Lal Hardayal) is the most significant figure among your choices for the Gadar Movement.