Filiform apparatus is a characteristic feature of .......

Two fair dice are rolled. The probability of the sum of digits on their faces being greater than or equal to $10$ is

$A$ proton, a deuteron, and an $\alpha$-particle having the same momentum enter a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. The ratio of deflections suffered by them is

Which of the following is not tetrahedral?

Cattle fed with spoilt hay of sweet clover which contains dicumarol:

If $\vec{a}, \vec{b}$ and $\vec{c}$ are vectors with magnitudes $2, 3$ and $4$ respectively,then the best upper bound of $|\vec{a}-\vec{b}|^2+|\vec{b}-\vec{c}|^2+|\vec{c}-\vec{a}|^2$ among the given values is