Select the option that expresses the meaning of the underlined segment.

The regulation bans any direct or indirect promotion through radio or television of supernatural practices.

The correct option is Occult.

Explanation:
The underlined word "supernatural" refers to forces, events, or practices that exist outside or beyond the laws of nature and scientific explanation, often associated with mystical, magical, or paranormal phenomena.

Let me analyze the given options to find the correct synonym:

1. Occult: Refers to mystical, secret, magical, or supernatural practices, beliefs, or phenomena. This perfectly matches the meaning of "supernatural".
2. Questionable: Means doubtful, uncertain, or open to suspicion.
3. Obtuse: Means slow to understand, insensitive, or lacking sharpness.
4. Evident: Means plain, obvious, or clearly seen and understood.

Therefore, Occult is the option that correctly expresses the meaning of the underlined segment.