3. 'Raja' and 'Suresh' were engaged in business having same nature. 'Raja' stands surety for 'Suresh' for any amount which 'Kala' may lend to 'Suresh' from time to time during the next 6 months subject to a maximum of * 2,85,000. 3 months later, 'Raja' revokes the guarantee, when 'Kala' had lent to 'Suresh' * 2,35,000. Decide whether 'Raja' is