This is abhaya mudra. This is the symbol of tapasya (penance ... You will see the same symbol in Guru Nanak's photo, in Buddha's and Mahavir's... The freedom movement was a fight of tapasya ...

In Islam, when someone prays, they take ‘Abhaya Mudra’ with both hands.” Gandhi also observed the gesture in images of Jesus Christ and Mahatma Buddha, emphasising its universal significance.