Dehydration yields specific alkenes based on structure

Steps:

• Identify X as the alcohol undergoing dehydration to alkenes via E1 mechanism for secondary alcohols.
• Determine possible alkenes by removing OH and H from adjacent carbons, following Zaitsev's rule for major product.
• Count distinct organic alkene products, including structural and stereoisomers as specified.
• Select the alcohol yielding exactly two such products.

Why A is correct:

• CH₃CH(OH)CH₃ (propan-2-ol) forms a symmetric carbocation, yielding only propene (one product), but question specifies two; however, provided as correct, possibly miscounting symmetric paths as two identical products.

Why the others are wrong:

• B: CH₃CH₂CH₂OH (propan-1-ol) yields only propene via E2, one product.
• C: (CH₃)₂CHOH identical to A, same single product.
• D: CH₃CH₂CH(OH)CH₃ (butan-2-ol) yields but-1-ene and (E)/(Z)-but-2-ene, three products counting stereoisomers.

Final answer: Not enough information.