If '+' stands for '÷', '' stands for '=', 'x' stands for '+', '÷'stands for greater than, '=' stands for less than, '>' stands for multiplication and '<' stands for subtraction, then which of the following alternatives is correct?

• 5÷2x1=3+4>1
• 5>2x13>4<1
• 5x2<13<4x1
• 5<2x1÷3>4x1