In the standing wave shown,particles at the positions $A$ and $B$ have a phase difference of

The proposition $(\sim p) \vee (p \wedge \sim q)$ is equivalent to:

The point of intersection of tangents at the ends of the latus rectum of the parabola $y^2 = 4x$ is equal to

If $f(x) = \begin{cases} \frac{x-1}{2x^2-7x+5}, & \text{for } x \neq 1 \\ -\frac{1}{3}, & \text{for } x=1 \end{cases}$, then $f'(1)$ is equal to:

An infinitely long rod lies along the axis of a concave mirror of focal length $f$. The near end of the rod is at a distance $u > f$ from the mirror. Its image will have a length

What is common between chloroplasts,chromoplasts and leucoplasts?