17731 . How many triangles are there in the following diagram? ..

• 
• A. 9
• B. 12
• C. 15
• D. 13

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Answer: Option A

Explanation:

17732 . What is the density of pure water? ..

• A. $4g/c{m}^2$
• B. $1g/c{m}^2$
• C. $6g/c{m}^2$
• D. $9g/c{m}^2$

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Answer: Option B

Explanation: