In which of Shakespeare's literary works did he depict the characters of "Sebastian and Viola"?

Twelfth Night: 
- এটি Shakespeare এর একটি বিখ্যাত comedy. 
- ১৬০২-০৩ সালের দিকে লেখা এই comedy টি ১৬২৩ সালে Shakespeare এর  First Folio অন্তর্ভুক্ত হয়ে প্রকাশিত হয়।
- এ নাটকের পটভূমি Illyria নামক কাল্পনিক অঞ্চলকে ঘিরে।

Important Characters from Twelfth Night:
- Sebastian;
- Viola;
- Olivia;
- Malvolio.

• Famous quotes from Twelfth Night:
- “Some are born great, others achieve greatness.”
- “Be not afraid of greatness. Some are born great, some achieve greatness, and others have greatness thrust upon them.”
- “If music be the food of love, play on,
Give me excess of it; that surfeiting,
The appetite may sicken, and so die.”
- “Better a witty fool, than a foolish wit.”

Other comedies by William Shakespeare: 
- As you like it,
- All's well that ends well,
- A Mid Summer Night Dreams,
- The Tempest,
- The Taming of the Shrew,
- The Merchant of Venice,
- Much Ado About Nothing,
- Measure for Measure,
- The Comedy of Errors, ইত্যাদি।

Source: 
1. Encyclopedia Britannica. 
2. Spark Notes.