Subhas Chandra Bose escaped from house arrest in Calcutta, disguised as a Pathan, and left India in January of the year:

Subhas Chandra Bose escaped from house arrest in Calcutta on the night of 16-17 January 1941, disguised as a Pathan insurance agent named "Muhammad Ziauddin".

Background:

• In 1940, Bose was arrested by the British for organising a protest to remove the Holwell Monument in Calcutta.
• In jail, he went on a hunger strike, and the government released him and placed him under house arrest at his home at 38/2 Elgin Road, Calcutta.

The escape (the "Great Escape"):

• Bose grew a beard and pretended to be ill and in seclusion, to avoid suspicion.
• On the night of 16-17 January 1941, he slipped out of his house, disguised as a Pathan.
• His nephew, Sisir Kumar Bose, drove him to Gomoh railway station (now Netaji Subhas Chandra Bose Gomoh, in Jharkhand), from where he took a train to Peshawar.
• From Peshawar, with the help of Bhagat Ram Talwar, he crossed the frontier on foot into Afghanistan, pretending to be a deaf and dumb pilgrim.
• He reached Kabul, and later travelled through the Soviet Union, using an Italian passport under the name "Orlando Mazzotta".
• He reached Berlin, Germany, in early April 1941.
• The British discovered his escape only several days later.

The car:

The Wanderer car in which he escaped is preserved at the Netaji Bhawan in Kolkata.

In Germany:

• Bose sought the help of Germany to free India, and organised Indian prisoners of war into a fighting force.
• In 1943, he travelled by German and Japanese submarines to South-East Asia.

Commemoration:

The "Great Escape" is commemorated every year on 16-17 January at Netaji Bhawan, Kolkata.

Why not the other options?

• ✗1939 was the year the Second World War began; 1943 and 1945 were later years.