CTET 2 Math and Science Jan 2021 Paper

From option (b),
${65}^2=4225$
${72}^2=5184$
${97}^2=9409$
${65}^2+{72}^2=4225+5184$ $=9409={97}^2$
Since, all the three sides of triangle satisfies Pythagoras theorem,
(Hypotenuse $=$ Base ${}_{}^2+$ Perpendicular ${}^2$ )
Therefore, this triangle is a right angle triangle.