The ratio of rise time to fall time can be equated to

• A. ‚âà√≠‚Äö√¢¬ßn/‚âà√≠‚Äö√¢¬ßp
• B. ‚âà√≠‚Äö√¢¬ßp/‚âà√≠‚Äö√¢¬ßn
• C. ‚âà√≠‚Äö√¢¬ßp*‚âà√≠‚Äö√¢¬ßn
• D. ‚âà√≠‚Äö√¢¬ßp/2‚âà√≠‚Äö√¢¬ßn