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71. 

The credit of developing the polio vaccine goes to
A. Jones Salk
B.

जोनास साल्क
C.

जे.एल. बैरर्ड
D.

जे पर्किंस
72. 

The headquarter of ESCAP Economic and Social Commission for Asia are situated at
A. Bangkok
B.

Genevaजिनेवा 
C.

सेंटिआगो, चिली)
D.

बगदाद
73. 

The industrial organization of Atomic Minerals Division, Heavy Water Board (HWB) is located at
A. Mumbai
B.

कोलकाता 
C.

हैदराबाद
D.

जदुगूदे,बिहार 
74. 

The headquarter of OAU (Organization of African Unity) are at
A. Addis Ababa, Ethiopia
B.

वाशिंगटन डी सी
C.

पेरिस
D.

जकार्ता, इंडोनेशिया
75. 

The Indian Air Force celebrated its Golden Jubilee in
A. 1962
B.

1972
C.

1982
D.

1992