Interceptor: "At the end of the enemy Movement phase, a weapon with the Interceptor special rule can be fired at any one unit that has arrived from reserve within its range and line of sight".
In the case of the Drop Pod, going by RAW, I'd say you can shoot at either the vehicle or the unit that has disembarked from it, since models must be disembarked by the end of the phase from a Drop Pod when it lands.
In the case of the Rhino, it's a little more vague, since the embarked models weren't a legal target until the end of the Movement phase "sub-phase". However, I'd still say you can shoot at them, since the models embarked still arrived from reserve. So as long as they're still within range and line of sight of the weapon that's shooting at them, I'd say "Yes" to both questions as well.