Which of the Following Statement(s)is (Are)true About a Compound That

Multiple Choice

Which of the following statement(s) is (are) true about a compound that has a molecular ion peak in its mass spectrum at mass 69 and shows a prominent peak in its IR spectrum at 2250 cm^-1?

A) The compound has a molecular mass of 70.
B) The compound contains a C=O group.
C) The compound contains a cyano or alkyne group.
D) Both (The compound has a molecular mass of 70) and (The compound contains a C=O group) are true statements.
E) Both (The compound has a molecular mass of 70) and (The compound contains a cyano or alkyne group) are true statements.