Minamata disease was caused due to the consumption of

The number of arrangements of the letters of the word $PALANHAR$ in which no two vowels are together and exactly two vowels are at odd places,is

The number of $5$-digit numbers that are not divisible by $5$ and consist of different odd digits is:

Which sugar is represented by the structural formula shown below?

$A$ particle is suspended from a vertical spring which is executing $S.H.M.$ of frequency $5 \ Hz$. The spring is unstretched at the highest point of oscillation. What is the maximum speed of the particle? (Take $g = 10 \ m/s^2$)

The function $f(x) = \log(1 + x) - \frac{2x}{2 + x}$ is increasing on