Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science

The international stable isotope standard Vienna Peedee Belemnite (VPDB) is used for the following stable isotope systems:

A. ³⁴S/³²S

B. ²H/¹H

C. ¹⁸O/¹⁶O

D. ¹⁶N/¹⁵N

E. ¹³C/¹²C

Choose the correct answer from the options given below:

1

A and B only

2

B and C only

3

C and E only

4

D and E only

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