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Realistically you’d better apply to all three and then pray to the god of your choice that your writing and focus improve a helluva lot.
Your use of the rare word (rare in the younger generation) “elder” suggests that you’re an older ■■■■■.
If you’re a young ■■■■■, your unhelpful omission of applicant status (2014?, 2015?), unhelpful omission of what you’re looking for in a school, unhelpful statement "dunno … havent decided " – all tell me you aren’t acute enough to get into any of these three hyper-selective schools.
So good luck to you, mate.</p>