1 .

• A. $a{x}^2+bx+c=0$
• B. $y^2=ax$
• C. $x^2+y^2=16$
• D. $y^2=2x+7$

Answer: Option C

Explanation:

2 .

• A. $3x^2+4y^2=2$
• B. $xy=1$
• C. $x+y=4$
• D. $x^2+y^2=5$

Answer: Option D

Explanation:

3 .

• A. $a{x}^2+bx+c=0$
• B. $y^2=a\left(x-2\right)$
• C. $x^2+{\left(y-2\right)}^2=7$
• D. $y^2=2x+7$

Answer: Option C

Explanation: