Explanation
- A
Bhagat Singh
Bhagat Singh was a leading early member and driving force of the Naujawan Bharat Sabha formed in 1926 in Lahore. He is therefore not the person who was not a member. This option names a founder-circle figure.
- B
Yaspal
Yashpal (Yaspal) belonged to the same Punjabi revolutionary youth circle around the Sabha. He is counted among early associates, not as the outsider on this list.
- C
Chhabil Das
Chhabil Das was associated with the Naujawan Bharat Sabha’s early organisational work. He is not the odd name. The question’s ‘NOT’ does not fall on him.
- D
Ambika Chakravarti
(d) Official key: Ambika Chakravarti was a revolutionary of the Chittagong group (Surya Sen’s circle), not an early member of the Lahore Naujawan Bharat Sabha of 1926. Bhagat Singh, Yashpal and Chhabil Das belong to that Sabha’s early set. The name that does not fit is Ambika Chakravarti.
Summary. Official key is (d). Naujawan Bharat Sabha (1926, Lahore) gathered Bhagat Singh and comrades such as Yashpal and Chhabil Das. Ambika Chakravarti’s field was the Chittagong revolutionary movement, a different organisation and region. The early member who is not on that Sabha list is therefore Ambika Chakravarti.