$MTP$ is considered safe up to how many weeks of pregnancy?

Which of the following groups of cells in the male gonad represents haploid cells?

Negation of the statement "The payment will be made if and only if the work is finished in time." is

If $p \rightarrow (\sim p \vee q)$ is false,then the truth values of $p$ and $q$ are,respectively

The work function of a metal is $2 \text{ eV}$. If a radiation of wavelength $3000 \text{ Å}$ is incident on it,the maximum kinetic energy of the emitted photoelectrons is (Planck's constant $h = 6.6 \times 10^{-34} \text{ J s}$; velocity of light $c = 3 \times 10^8 \text{ m/s}$; $1 \text{ eV} = 1.6 \times 10^{-19} \text{ J}$)

The solution of $\tan y \frac{dy}{dx} = \sin(x+y) + \sin(x-y)$ is