14. MC=","options":{"A":"m","D":"my A+Barrow 15. A+Barrow HCequiv CHxrightarrow [Delta ](NaNH_(2))arrow Axrightarrow [-2?](CH_(3)I)Bxrightarrow [Delta ](NaNH_(2))Cxrightarrow [CH_(3)CH_(3)CH_(3)]_(-2)]Dxrightarrow [2HBr](2HBr)

14. The correct answer is A: m.<br /><br />15. The correct answer is D: my.<br /><br />Explanation:<br />14. The question is asking for the correct symbol to represent the variable m. The options provided are A: m and D: my. The correct answer is A: m, as it is the correct symbol to represent the variable m.<br /><br />15. The question is asking for the correct compound to represent the reaction. The options provided are A: m, B: my, C: HC≡CH, D: my. The correct answer is D: my, as it is the correct compound to represent the reaction.