Read the paragraph and fill the blanks with the correct option sequence:
The blood vascular system of a cockroach is of ___(i)___ type, as blood flows in the body cavities. The generalised body cavity is called ____(ii)____. Blood is colourless due to the absence of ____(iii)____. The heart is ____(iv)____ and works in coordination with alary muscles for contractions and dilations.
(i) Open (ii) Haemocoel (iii) Hemoglobin (iv) 13 chambered