Sarjapur ya Electronic City, real rental yield kya hai?

₹1.4 Cr for a 2BHK in Sarjapur Road, I'm confused about real rental yields. Builders quote 4.5% tak, but ground reality kya hai? I'm eyeing Prestige Meridian Park versus a 3BHK in Godrej Reflections near Electronic City. My budget is ₹1.5 Cr. As someone in RE, I know market talks, but after expenses, actual rental yield kitna milta hai? Any real experiences from owners in Whitefield ya Sarjapur?