1 . →Aও →B

• A. $\underset{A}{\to }\times \underset{B}{\to }=\underset{B}{\to }\times \underset{A}{\to }$
• B. $\underset{A}{\to }\times \underset{B}{\to }=-\underset{B}{\to }\times \underset{A}{\to }$
• C. কোনটিই নয়
• D. A ও B উভয়ই

Answer: Option B

Explanation: