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| Q.20 | ‘संख्या – संघटन’ का निम्नलिखित में से कौन-सा युग्म सही है? I. परमाणु संख्या – प्रोटॉनों की संख्या II. द्रव्यमान संख्या – न्यूट्रॉन और प्रोटॉन की संख्या का योग | |
| Ans | 1. केवल II | |
| 2. I और II दोनों | ||
| 3. केवल I | ||
| 4. न तो I और न ही II |
Correct Ans Provided: 2
