$A$ steroid hormone which regulates glucose metabolism is

$A$ convex lens of focal length $F$ produces a real image $n$ times the size of the object. The image distance is

Which one of the following generally acts as an antagonist to gibberellins?

Two parallel rails of a railway track, insulated from each other and from the ground, are connected to a millivoltmeter. The distance between the rails is $1 \, m$. $A$ train is travelling with a velocity of $72 \, km/h$ along the track. What is the reading of the millivoltmeter (in $mV$)? (The vertical component of the Earth's magnetic field is $2 \times 10^{-5} \, T$.)

If $\frac{3x}{(x-a)(x-b)} = \frac{2}{x-a} + \frac{1}{x-b}$,then $a:b$ is equal to

The oxidation number of $Pt$ in $[Pt(C_2H_4)Cl_3]^-$ is