• A. a
• B. 2a
• C. $2a^2$
• D. mn
• E. $a^2$

Answer: Option A

Explanation:

• A. $\left[-2,2\right]$
• B. $(-\infty -2]$
• C. $[4,\infty )$
• D. $[2,\infty )$

Answer: Option D

Explanation:

• A. $\infty ,\infty$
• B. $\mathrm{ℝ},\mathrm{ℝ}$
• C. $\mathrm{ℝ}\setminus \left\{4\right\},\mathrm{ℝ}$
• D. $\mathrm{ℝ}\setminus \left\{4\right\},\mathrm{ℝ}\left\{8\right\}$

Answer: Option D

Explanation:

• A. $\propto >\beta$
• B. $\propto =\beta$
• C. $\propto <\beta$
• D. কোনোটিই নয়

Answer: Option C

Explanation:

• A. $\frac{2}{3}$
• B. $cos\frac{\pi }{4}$
• C. $\frac{4}{5}$
• D. $\frac{-5}{3\sqrt{6}}$

Answer: Option D

Explanation:

• A. $\frac{9}{2}$
• B. $9$
• C. $\frac{8}{3}$
• D. $\frac{4}{3}$

Answer: Option B

Explanation:

• A. $\frac{25}{2}$
• B. $25$
• C. $\frac{15}{2}$
• D. $5$

Answer: Option A

Explanation:

• A. 15 π
• B. 10 π
• C. 20 π
• D. 25 π

Answer: Option A

Explanation:

• A. $\frac{3}{5}$
• B. $\frac{1}{2}$
• C. $\frac{4}{5}$
• D. $\frac{3}{4}$

Answer: Option C

Explanation:

• A. $\pm 3$
• B. $\pm 4$
• C. $\pm 5$
• D. $\pm 6$

Answer: Option C

Explanation:

• A. বাস্তব ও সমান
• B. বাস্তব ও অসমান
• C. জটিল ও সমান
• D. জটিল ও অসমান

Answer: Option D

Explanation:

• A. $\frac{7\mathrm{\pi }}{3}$
• B. $\frac{2\mathrm{\pi }}{3}$
• C. $\frac{4\mathrm{\pi }}{3}$
• D. $\frac{\mathrm{\pi }}{3}$

Answer: Option D

Explanation:

• A. $\frac{\pi }{4}$
• B. $\frac{\pi }{3}$
• C. $\frac{2\pi }{3}$
• D. $\frac{3\pi }{4}$

Answer: Option C

Explanation:

• A. $5\times 3$
• B. $4\times 5$
• C. $5\times 5$
• D. $4\times 4$

Answer: Option D

Explanation:

• A. $5\times 4$
• B. $4\times 5$
• C. $5\times 3$
• D. $4\times 4$

Answer: Option C

Explanation: