An animal phylum having radially symmetrical adults but bilateral symmetrical larvae is

$\sqrt[4]{17 + 12\sqrt{2}} = $

If the plane $3x - 2y - z - 18 = 0$ meets the coordinate axes at $A$, $B$, and $C$, then the centroid of $\triangle ABC$ is:

The differential equation of the family of parabolas with vertex at $(0, -1)$ and having axis along the $Y$-axis is

$n$ conducting wires of same dimensions but having resistivities $1, 2, 3, . . . , n$ are connected in series. The equivalent resistivity of the combination is

In the reaction,$C_2H_5OC_2H_5 + CO \xrightarrow[150^{\circ}C, 500 \text{ atm pressure}]{BF_3} X$. What is $X$?