_____ येथील सविनय कायदेभंग चळवळीच्या काळात "कामगार व शेतकरी हे राष्ट्रीय सभेचे हात व पाय आहेत" अशा घोषणा दिल्याजात असत.

The correct answer is Option B (In Mumbai).

Key Points:
• Civil Disobedience Movement in Bombay (1930):
• During the Civil Disobedience Movement (1930–31), Bombay (Mumbai) was the epicenter of militant urban nationalist agitation and mass participation.
• The Bombay Provincial Congress Committee mobilized thousands of mill workers (Girni Kamgars), dockers, transport workers, and rural peasants.
• Slogans highlighting the vital socialist-nationalist alliance emerged across Mumbai's industrial and labour suburbs (like Lalbaug and Parel): *"कामगार व शेतकरी हे राष्ट्रीय सभेचे हात व पाय आहेत"* (Workers and peasants are the hands and feet of the Indian National Congress).
• This unity enabled massive picketing of foreign cloth shops, complete economic boycotts, and widespread defiance of colonial laws throughout Bombay city.
• Key Takeaway: In Mumbai, the slogan 'Workers and peasants are the hands and feet of the Congress' was popularized during the 1930 Civil Disobedience Movement.