A disease which spreads by contact is called-

• A disease which spreads by contact is called - Contagious.

• Contagious (adjective)
- English Meaning: a contagious disease spreads by close contact between people.
- Bangla Meaning: (adjective) (১) সংক্রামক। (২) সংক্রামক রোগবহনকারী। (৩) (লাক্ষণিক) দেখাদেখি বিস্তৃত হয় এমন: Laughter is often contagious, হাসি প্রায় সংক্রামক।

• Other options:
ক) Incurable
- English Meaning: that cannot be cured.
- Bangla Meaning: দুরারোগ্য।

গ) Infectious
- English Meaning: an infectious disease can be passed easily from one person to another, especially through air or water.
- Bangla Meaning: infectious দ্রষ্টব্য contagious.

ঘ) Fatal
- English Meaning: causing or ending in death.
- Bangla Meaning: [ফেইট্‌ল্‌] (adjective) (১) fatal (to) প্রাণনাশক; মারাত্মক: a fatal accident. (২) নিয়তির মতো; নিয়তিমূলক; নিয়তিনির্ধারিত: the fatal day. fatally (adverb)

• সুতরাং, অপশনের অর্থ বিবেচনা করে দেখা যায় যে, A disease which spreads by contact is called - Contagious.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Oxford Learner’s Dictionaries.